tady to neprobehlo... relatine velkej progress v recyklaci vte + win win win pro cementovej prumysl a klima
Concrete Benefits: Recycling Old Wind Turbine Blades Could Help Cement Industry Cut CO2 Emissions | GE News
https://www.ge.com/...-benefits-recycling-old-wind-turbine-blades-could-help-cement-industry-cut-co2
On average, a single wind turbine operating in the U.S. reduces emissions to the tune of 4,600 metric tons of CO2 each year, according to the Environmental Protection Agency. In 2019 alone, the electricity generated from wind turbines around the world avoided the equivalent of roughly 42 million cars’ worth of CO2 emissions.
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Now, however, there’s a new way to give old blades a more eco-friendly ending — one that not only recycles the material but puts it to a truly efficient use helping the cement industry dial back its own significant CO2 emissions. “It’s a very elegant solution, because it addresses several requirements for the cement production process, making it more sustainable from multiple perspectives,” says Michelle Simpson, a productivity and technology leader at GE Renewable Energy. “Firstly, it provides energy for the manufacture of cement by replacing coal. It also replaces some of the raw materials that are part of the cement recipe, such as sand and clay, that would otherwise have to be mined or sourced from other locations.”
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When fed into the crucible of the cement kiln, the material could help cement manufacturers lower CO2 emissions by as much as 27% compared to the traditional manufacturing process, according to Simpson. She says the new initiative will reuse nearly 90% of the blade material by weight. More than 65% of the blade weight will replace the sand, clay and other raw materials that would otherwise be added to the kiln to create the cement. Approximately 28% of the blade weight takes over the role of coal: providing energy for the chemical reaction in the cement kiln.
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An environmental impact analysis conducted by Quantis U.S., a sustainability consulting group, has found that recycling a single 7-ton blade in this way enables the cement kiln to avoid consuming nearly 5 tons of coal, 2.7 tons of silica, 1.9 tons of limestone, and nearly a ton of additional mineral-based raw materials.